Sunday. Before its release in March and since, the riveting and vital documentary “Bully”remains one of the most-discussed films out there. As it should be. Colorado College alum Cynthia Lowen, who co-wrote and co-produced the doc with director Lee Hirsch, will be at her alma mater this weekend to discuss the making of the movie, as well as the ratings controversy it stirred — at 2 p.m. Sunday at Armstrong Hall, 14 E. Cache La Poudre St. in Colorado Springs. Want to see the film before Lowen’s talk? It’ s playing at the Mayan, UA Denver West Stadium, AMC Highlands Ranch and AMC Westminster Promenade. Lisa Kennedy